Acquisition - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 17, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 15, 2016	Mar. 31, 2016	Mar. 28, 2016	Jan. 25, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Acquisition, cash paid				$ 0	$ 4,000
Common stock, par value (in dollars per share)		$ 0.04		$ 0.04		$ 0.04		$ 0.04	$ 0.04	$ 0.04
Amortization of intangible assets		$ 300	$ 300	$ 700	300
Goodwill		633		$ 633						$ 633
AHS acquisition
Business Acquisition [Line Items]
Acquisition, purchase price	$ 7,000
Acquisition, cash paid	$ 4,000
Shared to be issued in acquisition (up to amount) (in shares)	433,333
Common stock, par value (in dollars per share)	$ 0.04
Value of common stock issued in acquisition	$ 3,000
Acquisition, shares delivered at closing (in shares)	371,739
Acquisition, shares held back for working capital adjustment (in shares)	21,739
Acquisition, shares held back for indemnification (in shares)	39,855
Number of additional shares to be issued (in shares)				0
Goodwill							$ 633
Revenues attributable to AHS since the acquisition		2,700		$ 5,200
AHS acquisition | Amortization of Intangible Assets
Business Acquisition [Line Items]
Pro forma amortization of intangible assets					300
AHS acquisition | Acquisition-related costs
Business Acquisition [Line Items]
Pro forma amortization of intangible assets			600		700
AHS acquisition | Cost of operations
Business Acquisition [Line Items]
Amortization of intangible assets		300	200	500	200
AHS acquisition | Selling, general and administrative expenses
Business Acquisition [Line Items]
Amortization of intangible assets		$ 100	$ 100	$ 100	$ 100
AHS acquisition | Customer portal (existing technologies)
Business Acquisition [Line Items]
Estimated useful life				4 years
AHS acquisition | Customer relationships
Business Acquisition [Line Items]
Estimated useful life				8 years